I've been a lurker for awhile and only recently have I started to become active on the forum. It's time for me to contribute so here we go.
One of the questions I had about the new dynomax exhaust when I was in research mode was.....how loud is it? Since i had it installed yesterday i decided to do a quick DB check with a simple iPhone app. The first round of tests were 20 second snapshots. The vehicle is a 2012 grand cherokee with the v8 HEMI. The dynomax exhaust is the full catback system.....part number 39513....that was purchased from Amazon for $485.98 plus shipping.
The first test:
In the vehicle with the doors closed and engine off
Doors shut and engine at idle
I'll post some other results soon but I'd love for someone with a stock exhaust to download the tool and run the numbers for comparison.